Correct LPC810 flash size in linker script: (4K, not 64K)

Signed-off-by: Kamal Mostafa <kamal@whence.com>
Fix __delayticks() always_inline

Make __delayticks() 'static inline' so that always_inline will work as
intended.

Signed-off-by: Kamal Mostafa <kamal@whence.com>
gcc -fno-builtin to avoid putchar type clash

Signed-off-by: Kamal Mostafa <kamal@whence.com>